Another and Elfen Lied
Thank god I watched as it was released. All that blood... I don't think I could watch it all in one sitting... but then I saw this > http://www.youtube.com/watch?v=-iL_ZkYD_UM and then decided to marathon elfen lied - doing that was a bad idea

lol chicken i discovered Another at 11pm, i sat through the whole thing and finished it at 6:30 am
jaw fell a few times in the process but in the end i knocked out lmao